Abstract
A creep model based on the damage mechanics is proposed in this study to describe the three-stage creep deformation of rocks under conventional triaxial loading conditions. The proposed model has a simple form as it is based on the mechanism which assumes that the time-dependent creep behavior of rocks is solely described by the damage evolution. Verification of the proposed model against the creep tests shows that the model can reflect the three-stage creep behavior under higher stress levels as well as the elastic behavior under lower stress levels using the same model equations. The features of the proposed model include: (1) Simple mathematical form as it contains only one strain component without strain partitioning, and one set of equations to predict the creep deformation for all stress levels; and (2) The model requires only four parameters. All these features make the proposed model simple to use and easy to implement.
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Ma, S., Gutierrez, M. A time-dependent creep model for rock based on damage mechanics. Environ Earth Sci 79, 466 (2020). https://doi.org/10.1007/s12665-020-09198-7
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DOI: https://doi.org/10.1007/s12665-020-09198-7